CN103782523A

CN103782523A - Structured codebook for uniform circular array (UCA)

Info

Publication number: CN103782523A
Application number: CN201180073130.2A
Authority: CN
Inventors: 朱源; 李庆华; 陈晓刚
Original assignee: Intel Corp
Current assignee: Apple Inc
Priority date: 2011-07-01
Filing date: 2011-11-30
Publication date: 2014-05-07
Anticipated expiration: 2031-11-30
Also published as: CA2840867A1; JP5833237B2; GB2505842A; CA2982151C; EP3716695B1; EP2727422A4; MY171295A; US8879667B2; DE112011105403T5; JP2016048948A; HUE032007T2; CN103782652A; CN103843414A; EP3716695A1; CN108718442A; BR122016006492A2; CN105337652B; RU2653059C1; IN2014CN00387A; AU2017203697A1

Abstract

Embodiments of the present disclosure describe method, apparatus, and system configurations that implement or otherwise use a codebook designed for antennas configured in a circular array. A method includes receiving, by user equipment (UE) from an enhanced node B (eNB) station of a wireless communication network, a Channel State Information Reference Signal (CSI-RS) for the UE to perform channel measurements of multiple antennas of the eNB station, wherein the multiple antennas are configured in one or more circular arrays, performing, by the UE, channel measurements of the multiple antennas of the eNB station using the received CSI-RS, and determining, by the UE, a code word based on the channel measurements, the code word being stored in a codebook designed for a circular antenna array. Other embodiments may be described and/or claimed.

Description

For the structuring code book of Homogeneous Circular array (UCA)

the cross reference of related application

The application requires the U.S. Provisional Patent Application number 61/504 of submitting on July 1st, 2011,054 senior interest, its whole specification is all incorporated into this thus by reference for all objects, but with inconsistent those chapters and sections of this explanation (if any words) except.

Technical field

Embodiment of the present disclosure relates generally to the field of wireless communication system, and relates more specifically to the use of the code book designing for the antenna of employing circular array configuration.

Background technology

Promote to continue to be developed and to dispose with the mobile network of broadband speed rates information.Such network can generically be called herein broadband wireless access (BWA) network.Can in broadband wireless technology, use multiple different type of device.Such device can comprise such as personal computer, hand-held device and other consumer electronic devices such as such as music player, digital filming device etc., and it is configured to communicate by letter by wireless broadband network.

Some communication systems such as such as closed loop multiple-input and multiple-output (MIMO) system can be utilized as to be had linear antenna arrays the code book of base station design of (for example, eight of every base stations of as many as antenna) promotes link establishment process.Be nonlinear and/or comprise that the antenna configuration of a large amount of antennas can need new code book design and scheme for emerging.

Accompanying drawing explanation

Embodiment will easily understand together with accompanying drawing by following detailed description.In order to promote this description, similarly label refers to similar structural detail.Embodiment by example unrestriced mode show at the picture in picture of accompanying drawing.

Fig. 1 schematically illustrates example broadband wireless access (BWA) network according to some embodiment.

Fig. 2 schematically illustrates according to the example enhancing Node B (eNB) of some embodiment and stands.

Fig. 3 schematically illustrates another example eNB station according to some embodiment.

Fig. 4 schematically illustrates the space channel model for circular antenna array according to some embodiment.

Fig. 5 schematically illustrates the link establishment scheme that realizes the code book designing for circular array according to some embodiment.

Fig. 6 is for set up the flow chart of the method for communication link at cordless communication network according to some embodiment.

Fig. 7 is for set up the flow chart of another method of communication link at cordless communication network according to some embodiment.

Fig. 8 schematically illustrates the example system that can be used for putting into practice various embodiment described herein.

Embodiment

Embodiment supplying method of the present disclosure, equipment and system configuration, its realization or to use by other mode be the code book that adopts the antenna of circular array configuration to design.In following detailed description, with reference to forming the wherein accompanying drawing of a part (wherein similarly numerals refers to like), and wherein by diagramatic way, the embodiment that wherein can put into practice purport of the present disclosure is shown.Be appreciated that and can use other embodiment and can carry out structure or logical changes and do not depart from the scope of the present disclosure.Therefore, following detailed description is also nonrestrictive, and the scope of embodiment is limited by the claim of enclosing and their equivalent.

Various operations and then employing are described as multiple separate operations for understanding the claimed the most helpful mode of purport.But the order of description should not be interpreted as implying that these operations must depend on order.Especially, these operations can be carried out not according to the order presenting.The operation of describing can be undertaken by the order different from the embodiment describing.Can carry out various operation bidirectionals and/or in extra embodiment, can omit the operation of description.

For object of the present disclosure, phrase " A and/or the B " meaning is (A), (B) or (A and B).For object of the present disclosure, phrase " A, B and/or the C " meaning is (A), (B), (C), (A and B), (A and C), (B and C) or (A, B and C).

Description can be used phrase " in an embodiment " or " in multiple embodiment ", and it is each refers to one or more in identical or different embodiment.

In addition, as the term using about embodiment of the present disclosure " comprises ", " comprising ", " having " and analog be synonym.

As used herein, term " module " can refer to the following, be the part of the following or comprise the following: the processor (shared, special or group) of application-specific integrated circuit (ASIC) (ASIC), electronic circuit, the one or more software of execution or firmware program and/or memory (shared, special or group), combinational logic circuit and/or functional other the applicable parts that provide a description.

Example embodiment can be herein about broadband wireless access (BWA) network description, this broadband wireless access (BWA) network comprises that basis is by third generation partner program (3GPP) and its growth, WiMAX Forum, Institute of Electrical and Electric Engineers (IEEE) 802.16 standards (for example, IEEE 802.16-2005 revises), Long Term Evolution (LTE) is planned together with any correction, upgrade and/or (for example revise, senior LTE plan, super mobile broadband (UMB) plan (also referred to as " 3GPP2 "), Deng) one or more agreements of regulation and the network that operates.The compatible BWA network of IEEE 802.16 is called WiMAX network (representing the acronym of global intercommunication microwave access) substantially, and it is by the authentication marks of the consistency of IEEE 802.16 standards and the product of Interoperability Testing.In other embodiments, communication plan described herein can with extra/alternative communication standard, standard and/or protocol-compliant.For example, embodiment of the present disclosure, applicable to the wireless network of other types, wherein can obtain similar advantage.Such network can include, but not limited to wireless lan (wlan), wireless personal-area network (WPAN) and/or wireless wide area network (WWAN), for example cellular network and analog.

The following example can use in multiple application, comprising reflector and the receiver of mobile wireless radio system.The radio system being specifically included in the scope of embodiment includes but not limited to, network interface unit (NIC), network adapter, base station, access point (AP), via node, enhancing Node B, gateway, bridge, hub and satellite radio telephone.In addition, radio system in scope of embodiments can comprise the system of satellite system, PCS Personal Communications System (PCS), two-way radio system, global positioning system (GPS), bidirection pager, personal computer (PC) and relevant peripheral hardware, PDA(Personal Digital Assistant), individual calculus accessory and all existing and following appearance, and it can be that principle that be correlated with and embodiment may suitably be applicable to wherein in essence.

According to various embodiment, the disclosure is described such method, it comprises: carry out the channel measurement of multiple antennas at eNB station by subscriber equipment (UE) for UE from the enhancing Node B (eNB) of the cordless communication network receiving channel state information reference signal (CSI-RS) of standing, wherein these multiple antennas adopt one or more circular array configurations; Use the CSI-RS receiving to carry out the channel measurement of multiple antennas at eNB station by UE; And determine code word by UE based on channel measurement, this code word is stored in the code book designing for circular antenna array.

In certain embodiments, method can comprise that by UE, the value of indication code word being sent to eNB stands, and this code word is for promoting the wave beam between eNB station and UE to form.

In certain embodiments, code book is the first code book that is stored in UE, and sends this value by UE and comprise that the index that sends code word is stored in the code word in second code book at eNB station for the identification of eNB station.

In certain embodiments, determine that by UE code word comprises that the tolerance of selecting to make to use channel measurement and calculate maximizes or minimized code word.

In certain embodiments, receive CSI-RS by UE and comprise that receiving CSI-RS carries out the channel measurement for 12 antennas at eNB station for UE.

In certain embodiments, individual antenna comprises 12 antennas that adopt single circular array configuration.In certain embodiments, individual antenna comprises 12 antennas that adopt three circular array configurations.

In certain embodiments, code word W is the value being limited by following formula:

, wherein l is the index of the code word in code book, and S is corresponding to the quantity of the antenna at eNB station, and Ψ is the relative phase difference between the antenna at eNB station, and L is corresponding to the quantity of code word in code book.

According to various embodiment, equipment comprises antenna, is configured to the processor of communicating by letter with enhancing Node B (eNB) station of cordless communication network via this antenna and the storage medium that is coupled in this processor, this storage medium has instruction stored thereon, if it is executed by processor, impel: carry out the channel measurement of 12 antennas at eNB station for equipment from eNB station receiving channel state information reference signal (CSI-RS), wherein these 12 antennas adopt one or more circular array configurations; Channel measurement based on using CSI-RS to carry out by equipment is determined code word, and this code word is stored in the code book designing for circular antenna array; And the value of indication code word is sent to eNB station, this code word is for promoting the wave beam between eNB station and equipment to form.

In certain embodiments, if instruction is performed, impels and use the CSI-RS receiving to carry out the channel measurement of 12 antennas at eNB station.Determine that code word can comprise that the tolerance of selecting to make to use channel measurement and calculate at equipment place maximizes or minimized code word.

In certain embodiments, code book is the first code book of the equipment of being stored in, and value is sent to eNB station comprises that the index that sends code word is stored in the code word in second code book at eNB station for the identification of eNB station.In certain embodiments, receive CSI-RS from eNB station and comprise that receiving CSI-RS carries out the channel measurement for 12 antennas at eNB station for equipment.

In certain embodiments, 12 antennas adopt single circular array setting.In certain embodiments, 12 antennas adopt three circular array settings.

According to various embodiment, another method comprises: utilize channel state information reference signals (CSI-RS) configure user equipment (UE) for carrying out the channel measurement of 12 antennas of base station by the base station of cordless communication network, wherein these 12 antennas adopt one or more circular array settings; And the value of the code word of the code book being designed for circular antenna array from UE reception indication by base station, this code word is made for promoting the wave beam between base station and UE to form by base station, the channel measurement of code word based on using the CSI-RS of configuration to carry out by UE.

In certain embodiments, method comprises by base station code word and promotes the wave beam between base station and UE to form.In certain embodiments, utilize CSI-RS configuration UE to comprise that utilization carrys out configuration UE for 12 antenna port CSI-RS patterns of 12 antennas of base station by base station.

In certain embodiments, 12 antennas adopt single circle setting to configure.In certain embodiments, 12 antennas adopt three circle settings to configure.

In certain embodiments, for the code book of circular antenna array at least partly by selecting codebook size L, using following formula

calculate first group the code word of individual quantity and calculate second group

the code word of individual quantity designs, and the code word of the code word of second group and first group is orthogonal.

In certain embodiments, base station is that enhancing Node B (eNB) base station and the UE of the network of internet protocol-based (IP) are mobile devices.

According to various embodiment, system comprises: processor, and it is configured to stand and communicate by letter with subscriber equipment (UE) via the enhancing Node B (eNB) of cordless communication network; And storage medium, it is coupled in this processor, this storage medium has instruction stored thereon, if it is executed by processor, impel: utilize channel state information reference signals (CSI-RS) configuration UE to be used for the channel measurement of the multiple antennas that carry out eNB station, wherein these multiple antennas adopt the setting of one or more Homogeneous Circular array; Receive the value of the code word of indicating the code book designing for circular antenna array from UE, the channel measurement of this code word based on using the CSI-RS of configuration to carry out by UE; And use code word between eNB station and UE, setting up link to promote the wave beam between eNB station and UE to form.

In certain embodiments, utilize CSI-RS configuration UE to comprise the CSI-RS of 12 antennas for eNB station is sent to UE.In certain embodiments, these 12 antennas adopt the array configurations of single circular.In certain embodiments, the array configurations of three circular of 12 antenna employings.

In certain embodiments, code word W is the value being limited by following formula: , wherein l is the index of the code word in code book, and S is corresponding to the quantity of the antenna at eNB station, and Ψ is the relative phase difference between the antenna at eNB station, and L is corresponding to the quantity of code word in code book.

In certain embodiments, cordless communication network is the network of internet protocol-based (IP).

Fig. 1 schematically illustrates example broadband wireless access (BWA) network 100 according to some embodiment.BWA network 100 can comprise one or more radio access networks (RAN) 20 and core network 25.

Subscriber equipment (UE) 15 can via with RAN 20 in radio link (" link ") the access core network 25 of base station (BS) (for example, in eNB

station

40,42 one, etc.).UE 15 can be for example subscriber station, and it is configured to use many inputs for example, to communicate by letter with eNB

station

40,42 with many output (MIMO) communication plans (having the closed-loop MIMO scheme of code book).For example, the value of code book (for example, code word) can be used for promoting in eNB

station

40,42 one with UE 15 between link establishment (for example, wave beam formation).One or more antennas of UE 15 can be used for the radio resource of the parallel multiple respective component carrier waves that utilize BWA network 100 (for example, it can be corresponding with

stand

40,42 antenna of eNB).In certain embodiments, UE 15 can be configured to use OFDM (OFDMA) in downlink communication for example and/or for example using single-carrier frequency division multiple access (SC-FDMA) to communicate by letter in uplink communication.Although Fig. 1 is depicted as cell phone by UE 15 substantially, in various embodiments, UE 15 can be personal computer (PC), net book, super mobile PC (UMPC), hand-held moving device, Universal Integrated Circuit Card (UICC), PDA(Personal Digital Assistant), client device (CPE), panel computer or other consumer electronic devices (for example MP3 player, digital filming device and analog).

ENB

station

40,42 can comprise: multiple antennas; One or more radio modules, for modulating and/or demodulation transmitting or the signal that receives on interface aloft; And one or more digital modules, for the treatment of the signal transmitting and receiving in this air

interface.ENB station

40,42 each can be configured to provide the radio resource across multiple carrier waves via multiple days alignment UE 15.In certain embodiments, one or more in eNB

station

40,42 comprise and adopt the antenna of circular array configuration and be configured to being that the code book that adopts the antenna of circular array configuration to design carries out link establishment process.In other embodiments, can use the base station of other types, it is communicated by letter with UE 15 with multiple antennas.

In certain embodiments, can be promoted via one or more nodes 45 with communicating by letter of UE 15 via RAN 20.These one or more nodes 45 can serve as the interface between core network 25 and RAN 20.According to various embodiment, one or more nodes 45 can comprise: mobile management entity (MME), it is for example configured to manage eNB

station

40,42 and core network 25(, one or more servers 50) between signaling exchange (for example, the checking of UE 15); Grouped data network gateway (PDN-GW), for providing gateway router to the Internet 55; And/or gateway (S-GW), for managing the user data tunnel between eNB

station

40,42 and the PDN-GW of RAN 20.Can use in other embodiments the node of other types.

Core network 25 can comprise checking for UE 15 is provided or associated with the foundation of communication link for example, for the logic (, module) of UE 15 with other actions of the connection status of BWA network 100 is provided.For example, core network 25 can comprise one or more servers 50, and it can be coupled in eNB

station

40,42 communicatedly.In an embodiment, these one or more servers 50 comprise home subscriber servers (HSS), and it can be used for leading subscriber parameter, for example user's international mobile subscriber identity (IMSI), authorization information and analog.In certain embodiments, one or more servers 50 can comprise aerial download (OTA) server.In certain embodiments, the logic associated with the different functionalities of one or more servers 50 quantity (for example comprise and combining in individual machine or module) that reduces server capable of being combined.

According to various embodiment, BWA network 100 is networks of internet protocol-based (IP).For example, core network 25 can be IP-based network.For example, interface between network node (, one or more nodes 45) can be based on IP, and its backhaul that is included in eNB

station

40,42 connects.

Fig. 2 schematically illustrates the example eNB station 40 according to some embodiment.ENB station 40 can comprise for example adopt circular array 205(, circle) multiple antenna 202(of configuration for example, Tx antenna), as can be seen.Adopt circular array (for example, circular array 205) configuration antenna 202 that eNB station 40 can be provided, the eNB station of its antenna configuring than the array that has employing linear array or be made up of linear array section is more suitable in directional communication.In certain embodiments, circular array 205 is that Homogeneous Circular array (UCA) makes the each antenna in antenna 202 separate identical radial distance with the vicinity/adjacent antenna in antenna 202.In the embodiment describing, antenna 202 comprises 12 antennas.Can use in other embodiments than more or less antenna of describing.

In the embodiment of Fig. 2, the antenna 202 of circular array 205 can configure to serve at single website place single sector (sector) 204.The configuration of Fig. 2 can provide presence of intercell interference still less with serve the configuration of zone similarity with linear array compared with.

Fig. 3 schematically illustrates another example eNB station 42 according to some embodiment.This eNB station 42 can comprise multiple antennas 302, and it adopts multiple circular array 305 to configure.In the embodiment describing, the plurality of circular array 305 comprises three circular array (for example, UCA), and each comprising wherein (for example,, in multiple antennas 305), four antennas were used for providing 12 antennas altogether.Can use in other embodiments more or less antenna.Three the website places that are configured in of Fig. 3 provide circular array for example to serve the first corresponding sector 304(, community 1), the second sector 306(for example, community 2) and the 3rd sector 308(for example, community 3)., the configuration of Fig. 3 needs more site/website with respect to the configuration of Fig. 2 and can not too be suitable for the operator of the limited cordless communication network in site (for example, the BWA network 100 of Fig. 1) compared with the configuration of Fig. 1.The embodiment at the eNB

station

40,42 of describing for Fig. 2 and 3 respectively in certain embodiments, is capable of being combined.In other embodiments, other applicable circular antenna configurations can be for other eNB stations.

Fig. 4 schematically illustrates the space coordinates 400 for the circular array 405 of

antenna

402a, 402b, 402c, 402d according to some embodiment.This space coordinates 400 can for example, for being used for example two-dimentional axle (, coordinate [X, Y]) to describe the UCA configuration of

antenna

402a, 402b, 402c, 402d.For example, circular array 405 can have radius R, and it is depicted as from coordinate [0,0] and extends to coordinate [1,0].Can calculate similar coordinate and describe the position for the individual body antenna of

antenna

402a, 402b, 402c, 402d.Can calculate the relative position of each antenna with respect to the reference antenna of

antenna

402a, 402b, 402c, 402d.For example, antenna 402a is chosen as reference antenna.It can be any angle to suppose antenna broadside B(), can calculate the unit vector M that represents one or more channel subpaths.Also can calculate the phase place contribution for one or more channel subpaths.

In one embodiment, can on mathematics, be represented by following formula to the calculating of the space channel model between UE for UCA.For example, for example, (for example can there is S element for the circular array at base station (, the eNB of Fig. 1 station 40 or 42), antenna) array and mobile radio station (MS) are (for example, the UE 15 of Fig. 1) can there is U element (for example, antenna) array, wherein S and U represent the total quantity of respective element.Can take advantage of s-matrix value to provide by U for the channel coefficients of in N multi-path component.For example, for n multi-path component (wherein n=1 ..., N), s component (wherein s=1 ..., S) and u component (u=1 ..., U), channel matrix h can provide as follows by formula (1):

Formula (1)

In formula (1), t is the time, P _nthe power in n path, σ _sFbe lognormal decline (lognormal shadow fading), it can be the univers parameter about n path for given slippage, M be the subpath in every path quantity (m=1 ..., M),

the BS antenna complex response to vertical polarization (V-pol) component,

the BS antenna complex response for horizontal polarization (H-pol) component,

the MS antenna complex response for V-pol component,

the MS antenna complex response for H-pol component, , wherein λ is that carrier wavelength and θ are the angles that each antenna array elements is positioned at a channel subpath in coordinate system wherein.For example,

represent the m path of leaving channel of the BS in coordinate system n subpath unit vector and

it is the unit vector of the n subpath in the m path of the arrival channel of MS.In formula (1), j is-1 square root,

the phase place of the m subpath in the n path between the vertical component of BS element and the vertical component of MS element,

the phase place between the vertical component of BS element and the horizontal component of MS element,

the phase place between the horizontal component of BS element and the vertical component of MS element, the phase place between the horizontal component of BS element and the horizontal component of MS element, r _n1be stochastic variable, its representative is left in vertical direction BS and is arrived in the horizontal direction the ripple (v-h) in n path and the power ratio of the ripple (v-v) leaving in vertical direction and arrive in vertical direction of MS, r _n2be stochastic variable, its representative is left in the horizontal direction BS and is arrived in vertical direction the ripple in n path and the power ratio of the ripple (v-v) leaving in vertical direction and arrive in vertical direction of MS,

the vector of indication antenna element s with respect to the position of the reference antenna of BS,

be the vector of indication antenna element u with respect to the position of the reference antenna of MS, and v represent the translational speed of MS and the velocity of direction.

Definitely aerial position vector

can for example, for example, use formula (2) to be calculated as follows for the antenna (,

antenna

402a, 402b, 402c, 402d) that adopts circular array (, UCA array) configuration, wherein R be the radius of circular array (for example, circular array 405):

formula (2)

Aerial position vector relatively

can use formula (3) to be calculated as follows, wherein

reference antenna:

formula (3)

Suppose F channel subpath direction, channel subpath unit vector k _lcan use formula (4) to be calculated as follows:

formula (4)

Antenna s can use formula (5) to be calculated as follows with respect to the relative phase difference of reference antenna:

formula (5)

Formula (5) can equal λ (for example,, for less circular array) and the channel angle setting for decile by supposition radius of circle R

and further simplify.Permanent mould order 1 pre-coding matrix (for example, the code word) W of l can use formula (6) to be calculated as follows:

formula (6)

In certain embodiments, formula (6) can for for adopting circular configuration the antenna calculating beamforming vector that configures or code word for example, to promote eNB station (, the

eNB station

40 or 42 of Fig. 1) and UE(for example, the UE 15 of Fig. 1) between wave beam form.For example, code word can be the value of pre-coding matrix W.L can be the index of code word in code book.According to various embodiment, the value of W is calculated and is stored in to be had

in the big or small order 1 structuring code book of individual position.In certain embodiments, code book can be for example, 12 Tx code books for 12 Tx antennas (, S=12 in formula (6)) at eNB station.Code book can be stored in one or two in UE and eNB station.

Formula (6) can further be simplified according to the attribute of Homogeneous Circular array.For example, if the L of equation (6) is the multiple of S, for example, in L=FS, formula (6) can rewrite as follows in formula (7):

formula (7)

Because circular matrix is this symmetrical attribute, the quantity of unique code word that design can be only F code word.The individual code word of all remaining F (S-1) can generate by the cyclic shift of F code word (one group of orthogonal code for example, is provided).For example, W _f+lcan use formula (8) to be calculated as follows:

formula (8)

If S is even number, can carry out the further simplification for the code book design of circular configuration.For example, if channel path is advanced by a pair of adjacent antenna for certain angle, this channel path will be advanced by another to adjacent antenna, still in the mirror position across circular configuration for this same angle.Such attribute can be used for further reducing the degree of freedom of code book design.

Order 1 code book (for example, for structuring order 1 code book of 12 Tx UCA) can be for circular configuration by for example selecting codebook size L(, L=16), use formula (6) to calculate first group

individual code word (for example, ) and then use formula (5) and (6) to calculate and first group

individual code word orthogonal second group

individual code word (for example,

or more generally

) design.In this respect, L can be corresponding with the quantity of code word in code book.Order 2 code books (for example, for 12 Tx UCA structuring order 2 code books) can design based on above-described order 1 code book.For example, the first row of order 2 code books can use from the l code word of order 1 code book and the secondary series of order 2 code books and can use (l+8) code word from order 1 code book.

Fig. 5 schematically illustrates the link establishment scheme 500 according to some embodiment, and it realizes the code book designing for circular array.The overlay area that enters eNB station (for example, eNB station 40) at 502, UE 105, this eNB station has the antenna of employing circular array (for example, UCA) configuration.ENB station 40 can detect that UE enters overlay area, and 504, eNB station 40 for example can utilize for the reference signal of the channel state information reference signals (CSI-RS) of UE 15 etc. and configure (for example, sending) UE 15 for using in the channel measurement that carries out eNB station.For example, in certain embodiments, CSI-RS can be 12 antenna port CSI-RS patterns.UE feeding back channel state information (CSI) can be asked so that can communicate by letter with UE 15 with closed-loop MIMO communication in eNB station in eNB station 40.

The CSI-RS that can receive in 506 uses at 506, UE 15 carries out channel measurement.UE 15 can be to stand each in multiple transmitting antennas of 40 and each reception antenna of UE 15 is carried out to channel measurement of eNB.For example, the in the situation that the eNB measuring therein having 12 Tx antennas and each Tx antenna and is mapped to a CSI-RS port and UE has two receivers (Rx) antenna in CSI-RS pattern, UE 15 can measure and will be stored in the two row/12 row channel matrix that is referred to as H with the each associated information in the Rx antenna of the Tx antenna at eNB station 40 and UE 15.In other embodiments, channel matrix H can have other sizes.

Can determine the code word forming for wave beam from code book based on the channel measurement carrying out at 508, UE 15.Code book can design for circular antenna array (for example, using formula (6) to calculate) and can be stored on the storage medium of UE 15.For example, one or more tolerance that UE 15 can be based on channel measurement (for example, the channel matrix capacity that wave beam forms, etc.) or preassigned are selected code word.Can select for example to make to carry out calculated value and maximize or minimize or meet by other mode with channel measurement the code word of preassigned.

In certain embodiments, the reception signal y receiving at UE 15 places is by formula (9) expression, and wherein H is channel matrix, and W is pre-coding matrix (for example, limiting in formula (6)), and x is the signal of transmitting, and n is noise vector:

formula (9)

ENB station 40 has in the situation of 12 Tx antennas therein, UE 15 has two Rx antennas, and signal transmitting order is one, y can have 2 and take advantage of 1 matrix dimensionality, H can have 2 and take advantage of 12 matrix dimensionality, W can have 12 and take advantage of 1 matrix dimensionality, and x can have 1 and take advantage of 1 matrix dimensionality, and n can have 2 and takes advantage of 1 matrix dimensionality.UE 15 can use formula (9) to determine code word (for example, value W).

Code word can be the value of the pre-coding matrix W that limited by formula (6) or its version., can to form code book can be maybe a part for code book to pre-coding matrix W.In certain embodiments, code word is the value that the wave beam for promoting between eNB station 40 and UE 15 forms.

At 510, UE 15, the index of code word is sent to eNB station 40.This index can be the value to eNB station 40 indication code words.For example, can make index of reference be identified in the code word that eNB for example stands, in another code book of 40 places (, outside at UE 15 and/or in eNB 40 this locality of standing) storage at 512, eNB station 40.In certain embodiments, the code book that is stored in UE 15 and eNB station 40 has the identical value being stored in wherein.In other embodiments, UE 15 can send to code word value eNB station 40.

Can come UE 15 wave beams to form by code word at 514, eNB station 40.In certain embodiments, UE 15 for example receives signal y(from eNB station 40, as limited in formula (9)).Can communicate by letter with the link that wave beam forms with eNB station at 516, UE 15.

Fig. 6 is for example, for set up the flow chart of the method 600 of communication link in wireless communication link (, the BWA network 100 of Fig. 1) according to some embodiment.According to various embodiment, the action of method 600 by the UE(of cordless communication network for example, the UE 15 of Fig. 5) carry out.

602, method 600 comprises the overlay area that enters base station (for example, the eNB station 40 of Fig. 5), and this base station (for example has one or more circular array of employing, corresponding Fig. 2 or 3 circular array 205 or 305) antenna (for example, corresponding Fig. 2 or 3 antenna 202 or 302) of configuration.These base stations can detect that UE has entered overlay area and utilized reference signal information to carry out configuration UE.

604, method 600 can further comprise from base station reception reference signal information.This reference signal information for example can comprise the CSI-RS pattern for the antenna of base station.This CSI-RS pattern can be received by UE the channel measurement of the antenna that carries out base station.

606, method 600 can further comprise with receive reference signal information carry out channel measurement.Based on CSI-RS pattern, UE can carry out the channel measurement of the antenna of base station.

608, method 600 can further comprise that the channel measurement based on carrying out determines code word.UE can for example, by making tolerance maximize or minimizing or the code word that meets other preassigneds is determined code word (, using formula (6) calculating) from codebook selecting.For example, based on the information of obtaining from carrying out channel measurement, UE can select to make the code word of channel matrix maximum capacity.In certain embodiments, tolerance is calculated with channel measurement by UE.

610, method 600 can further comprise value is sent to base station, and this value indication will be by base station for promoting the code word that wave beam forms.The value that sends to base station by UE can comprise that the index of for example code word is stored in the code word in the code book of base station for identification of base stations.

612, method 600 can further comprise by beam forming process set up for the link of base station communication, this beam forming process is based on code word.UE can communicate by letter with the link of setting up with base station.

Fig. 7 is for example, for set up the flow chart of another method 700 of communication link in cordless communication network (, the BWA network 100 of Fig. 1) according to some embodiment.According to various embodiment, the action of method 700 can for example, be undertaken by base station (, the eNB of Fig. 1 station 40) or the corresponding control appliance of cordless communication network.

702, method 700 comprises and detects that subscriber equipment (for example, the UE 15 of Fig. 5) (for example enter base station, the eNB station 40 of Fig. 5) overlay area, this base station (for example has one or more circular array of employing, corresponding Fig. 2 or 3 circular array 205 or 305) antenna (for example, corresponding Fig. 2 or 3 antenna 202 or 302) of configuration.

704, method 700 can further comprise utilizes reference signal (for example, CSI-RS) to carry out configuration UE for carrying out channel measurement.UE can adopt CSI-RS pattern to be configured for to adopt the channel measurement of the antenna that one or more circular array arrange.Use CSI-RS pattern, UE can carry out channel measurement and determine code word based on channel measurement.UE can send to base station by the value of indication code word.

706, method 700 can further comprise the value that receives indication code word from UE.In certain embodiments, this value can comprise index.

708, method 700 can further comprise the code word using the value identification code book receiving from UE.For example, base station can reception hint, and its indication is stored in the site of the code word in the code book designing for circular array of base station in this locality.

710, method 700 can further promote the wave beam between base station and UE to form by code word.Base station can be used code word to form UE wave beam.

712, method 700 can further comprise that formation is set up link for communicating by letter between base station and UE based on wave beam.This link can be for example for wireless conveying a message between UE and eNB station.

Embodiment of the present disclosure can use any applicable hardware and/or software to be implemented in system with according to desired configuration.Fig. 8 schematically illustrates example system 800, and it can be used for putting into practice various embodiment described herein.For an embodiment, Fig. 8 examples shown system 800, it has one or more processors 804, be coupled in processor 804 at least one system control module 808, be coupled in the system storage 812 of system control module 808, the one or more communication interfaces 820 that are coupled in nonvolatile memory (the NVM)/storage 816 of system control module 808 and are coupled in system control module 808.

In certain embodiments, system 800 can play the effect of UE 15 as described herein.In other embodiments, system 800 can play Fig. 1 one or more servers 50 effect or provide logic/modules by other mode, it carries out the function as for example, described for base station herein (, the eNB of Fig. 1 station 40).

For an embodiment, system control module 808 can comprise any applicable interface controller, provides any applicable interface for any applicable device or the parts of communicating by letter at least one of processor 804 and/or with system control module 808.

System control module 808 can comprise Memory Controller module 810, for providing interface to system storage 812.This Memory Controller module 810 can be hardware module, software module and/or firmware module.

System storage 812 can be used for loading and stores for example data and/or the instruction for system 800.For an embodiment, system storage 812 can comprise any applicable volatile memory, for example applicable DRAM.In certain embodiments, system storage 812 can comprise double data rate type four Synchronous Dynamic Random Access Memories (DDR4 SDRAM).

For an embodiment, system control module 808 can comprise one or more I/O (I/O) controller, for providing interface to NVM/ storage 816 and communication interface 820.

NVM/ storage 816 can be used for storing for example data and/or instruction.NVM/ storage 816 can comprise any applicable nonvolatile memory, for example flash memory, and/or can comprise any applicable Nonvolatile memory devices, for example one or more hard disk drives (HDD), one or more compact disk (CD) driver and/or one or more digital versatile disc (DVD) driver.

NVM/ storage 816 can comprise storage resources, and it is a part for the device that is installed in of system 800 physically, or it may be accessed by device but its part not necessarily.For example, NVM/ storage 816 can visit by network via communication interface 820.

Communication interface 820 can provide interface to communicate by letter by one or more network service and/or the device applicable with any other to system 800.System 800 can be according to any and the one or more parts radio communications of wireless network in one or more wireless network standards and/or agreement.

For an embodiment, at least one in processor 804 can for example, be packaged together with the logic of one or more controllers of system control module 808 (, Memory Controller module 810).For an embodiment, at least one in processor 804 can be packaged together to form system in package (SiP) with the logic of one or more controllers of system control module 808.For an embodiment, at least one in processor 804 can be integrated on identical chip with the logic of the one or more controllers for system control module 808.For an embodiment, at least one in processor 804 can be integrated in and on identical chip, form system on chip (SoC) with the logic of one or more controllers of system control module 808.

In various embodiments, system 800 can be but be not limited to, server, work station, desk-top computer or mobile computing device (for example, calculation element on knee, hand-held computing device, panel computer, net book, etc.).In various embodiments, system 800 can have more or less parts, and/or different frameworks.For example, in certain embodiments, system 800 comprises one or more in filming apparatus, keyboard, liquid crystal display (LCD) screen (it comprises touch screen displays), nonvolatile memory port, multiple antenna, graphic chips, application-specific integrated circuit (ASIC) (ASIC) and loud speaker.

Although herein for the object diagram described with describe some embodiment, substitute and/or be equal to embodiment or realize and can replace the embodiment that illustrates and describe for realizing many kinds that identical object calculates, and not departing from the scope of the present disclosure.This application is intended to contain any adaptation or the variation of the embodiment discussing herein.Therefore, stipulate that clearly embodiment described herein is only by claim and equivalents thereof.

Claims

1. a method, comprising:

Carry out the channel measurement of multiple antennas at described eNB station by subscriber equipment (UE) for described UE from the enhancing Node B (eNB) of the cordless communication network receiving channel state information reference signal (CSI-RS) of standing, wherein said multiple antennas adopt one or more circular array configurations;

Use the CSI-RS receiving to carry out the channel measurement of multiple antennas at described eNB station by described UE; And

Determine code word by described UE based on described channel measurement, described code word is stored in the code book designing for circular antenna array.

2. the method for claim 1, it further comprises:

By described UE, the value of the described code word of indication is sent to described eNB and stand, described code word is for promoting the wave beam between described eNB station and described UE to form.

3. method as claimed in claim 2, wherein said code book is the first code book that is stored in described UE, and wherein

Send described value by described UE and comprise that the index that sends code word is stored in the code word in second code book at described eNB station for described eNB station identification.

4. the method for claim 1, wherein determines that by described UE described code word comprises that the tolerance of selecting to make to use described channel measurement and calculate maximizes or minimized code word.

5. the method for claim 1, wherein receives described CSI-RS by described UE and comprises that receiving CSI-RS carries out the channel measurement for 12 antennas at described eNB station for described UE.

6. method as claimed in claim 5, wherein individual antenna comprises 12 antennas that adopt single circular array configuration.

7. method as claimed in claim 5, wherein individual antenna comprises 12 antennas that adopt three circular array configurations.

8. the method for claim 1, wherein said code word W is the value being limited by following formula:

, wherein l is the index of the code word in described code book, and S is corresponding to the quantity of the antenna at described eNB station, and Ψ is the relative phase difference between the antenna at described eNB station, and L is corresponding to the quantity of code word in described code book.

9. an equipment, comprising:

Antenna;

Processor, it is configured to communicate by letter with enhancing Node B (eNB) station of cordless communication network via described antenna; And

Storage medium, it is coupled in described processor, and described storage medium has instruction stored thereon, if described instruction is carried out by described processor, impels:

Carry out the channel measurement of 12 antennas at described eNB station for described equipment from described eNB station receiving channel state information reference signal (CSI-RS), wherein said 12 antennas adopt one or more circular array configurations;

Based on determining code word by described equipment with the channel measurement that described CSI-RS carries out, described code word is stored in the code book designing for circular antenna array; And

The value of the described code word of indication is sent to described eNB station, and described code word is for promoting the wave beam between described eNB station and described equipment to form.

10. equipment as claimed in claim 9, if wherein said instruction is performed, further impels:

Use the CSI-RS receiving to carry out the channel measurement of 12 antennas at described eNB station.

11. equipment as claimed in claim 9, wherein determine that described code word comprises that the tolerance of selecting to make to use described channel measurement and calculate at described equipment maximizes or minimized code word.

12. equipment as claimed in claim 9, wherein said code book is the first code book that is stored in described equipment; And

Wherein described value is sent to described eNB station and comprise that the index that sends code word is stored in the code word in second code book at described eNB station for described eNB station identification.

13. equipment as claimed in claim 9, wherein receive described CSI-RS and comprise that receiving CSI-RS carries out the channel measurement for 12 antennas at described eNB station for described equipment from described eNB station.

14. equipment as claimed in claim 13, wherein said 12 antennas adopt single circular array to configure.

15. equipment as claimed in claim 13, wherein said 12 antennas adopt three circular array to configure.

16. equipment as claimed in claim 9, wherein said code word W is the value being limited by following formula:

17. 1 kinds of methods, comprising:

Utilize channel state information reference signals (CSI-RS) to carry out configure user equipment (UE) for carrying out the channel measurement of 12 antennas of described base station by the base station of cordless communication network, wherein said 12 antennas adopt one or more circular array configurations; And

Received the value of the code word of indicating the code book designing for circular antenna array from described UE by described base station, described code word is used for promoting the wave beam between described base station and described UE to form by described base station, the channel measurement of described code word based on using the CSI-RS of configuration to carry out by described UE.

18. methods as claimed in claim 17, it further comprises:

Promote the wave beam between described base station and described UE to form by described base station by described code word.

19. methods as claimed in claim 17, wherein utilize CSI-RS to configure described UE by described base station and comprise that utilization configures described UE for 12 antenna port CSI-RS patterns of 12 antennas of described base station.

20. methods as claimed in claim 17, wherein said 12 antennas adopt single circle setting to configure.

21. methods as claimed in claim 17, wherein said 12 antennas adopt three circle settings to configure.

22. methods as claimed in claim 17, wherein said code word W is the value being limited by following formula:

, wherein l is the index of the code word in described code book, and S is corresponding to the quantity of the antenna at described eNB station, and Ψ is the relative phase difference between the antenna at described eNB station, and L is corresponding to the quantity of the code word in described code book.

23. methods as claimed in claim 22, wherein for the code book of described circular antenna array at least partly by with the design of getting off:

Select codebook size L;

Use following formula

calculate first group the code word of individual quantity: and

Calculate second group the code word of individual quantity, the code word of the code word of described second group and described first group is orthogonal.

24. methods as claimed in claim 22, wherein said base station is that enhancing Node B (eNB) base station and the described UE of the network of internet protocol-based (IP) is mobile device.

25. 1 kinds of systems, comprising:

Processor, it is configured to stand and communicate by letter with subscriber equipment (UE) via the enhancing Node B (eNB) of cordless communication network; And

Utilize channel state information reference signals (CSI-RS) to configure described UE for carrying out the channel measurement of multiple antennas at described eNB station, wherein said multiple antennas adopt one or more Homogeneous Circular arrays to configure;

Receive the value of the code word of indicating the code book designing for circular antenna array from described UE, the channel measurement of described code word based on using the CSI-RS of configuration to carry out by described UE; And

Use the code word that the wave beam for promoting between described eNB station and described UE forms to set up link between described eNB station and described UE.

26. systems as claimed in claim 25, wherein utilize described CSI-RS to configure described UE and comprise the CSI-RS of 12 antennas for described eNB station is sent to described UE.

27. systems as claimed in claim 26, wherein said 12 antennas adopt the array of single circular to configure.

28. systems as claimed in claim 26, wherein said 12 antennas adopt the array of three circular to configure.

29. systems as claimed in claim 25, wherein said code word W is by following formula

the value limiting, wherein l is the index of the code word in described code book, and S is corresponding to the quantity of the antenna at described eNB station, and Ψ is the relative phase difference between the antenna at described eNB station, and L is corresponding to the quantity of code word in described code book.

30. systems as claimed in claim 25, wherein said cordless communication network is the network of internet protocol-based (IP).